Road-finishing machine



C. A. GU STA FSON ROAD FINI SHING MACHINE Filed Aug. 28, 1926 4Sheets-Sheet l March 24, 1931. C; A GUSTAFSON l1,797,288

ROAD FIKNISHING MACHINE Filed Aug. 28, 1926 4 shee'/slsheet 2 o it* n Eil l m .Q N a i :rbc l w m, I l\ N N 1 --l l@ K c i x9 i fnl/ufo? CARL AGwTAFJoN @www Marh 24, 1931.-

c. A. GusTAFsoN RA) FINISHING MACHINE 28, 1926 4 Sheets-Sheet 3 FiledAug.

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March 24, 1931. c. A. GUsTAFsoN 1,797,288

ROAD FINISHING MACHINE Filed Aug. 28 .1926 4 Sheets-sheet 4 .7m/@024CARL ,4.61/5TAF5ON l 40 finishing machine or drag.

Patented Mar. 24, 1931 UNITED STATES PATENT OFFICE CARL lA. GUSTAFSON,OF MINNEAPOLIS, MINNESOTA, ASSIGNOR, BY HESNE ASSIGN- MENTS,TOCA-TERPILLAR TRACTOR Q0.,

RATION F vGALIIE'OIB'NIA GIF/SAN LEANDRO, CALIFORNIA, A CORPO YMAD-FINISHING MAGHINE Application ined August as, 192s. serial N6.132,204).

This invention relates to new and useful improvements in road finishingmachines,

' commonly knownas road drags. An object of the invention is to providea road finishing machine comprising a frame having a plurality of bladesdisposed at dif- I ferent-angles, and adapted to be moved intoengagement with the road surface and to carry substantially the weightof the frame,

thereby preventing the blades from'chatterving whenoperating over theroad surface.

A further object of the invention is to provide a road drag comprisingavframe having tWfo or more blades rigidly secured thereto,

15 and also having a blade pivotally connected thereto 'with means foradjusting it with relation to the frame, whereby the loose dirt orgravel gathered by the rigidly mounted blades and delivered to theadjustably mounted blade, which preferably is positioned at the rear .ofthe machine, may be distributed over the road surface to filldepressions and l uneven places.

A further object is to provide a road drag comprising a ,plurality 4ofblades mounted upon a frame supported upon suitable carryin wheels, therear wheels having means for lliing them out Vof contact with the roadsurface when the blades are moved into contact therewith, wherebysubstantially the entire weight of the frame will befcarried upon theblades, the forward end of the machine having a fifth wheel ofcomparatively large diameter which functions to' minimize vside tiltingor rocking of the frame and to- Y' keep the blades in close contact withthe ground surface. The particular object of the invention, therefore,is to provide an improved road 4Other objects ofthe invention willappear from the following descri tion and the accompanying drawings anout in the annexed claims.

. '.In the accompanying drawings, therehas 12 secured thereto by gusset'platesr 13, as

will be pointed' been disclosed a structure designed to carry out thevarious objects of the invention, but it is to be understood that theinvention is not confined to the exact features shown, as variouschanges may be made within the scope of the `claims which follow.

In the accompanying drawings,

Figure 1 is a plan view of my improved machine showing the angularposition of the Y blades thereon;

Figure 2 is a side elevation of the machine with the blades ininoperative position;

Figure V3 is a detail sectional view on the line 3-3of Figure 2;

Figure 4;.is an enlar ed detail sectional view on the line 4-4 o Figure1,\showing the means provided forY adjustably supporting the scarifierframe and showing the scariier teeth positioned out of engagement withthe ground surface;

Figure 5 is a detail sectional view showing the scarier teeth adjustedto engage the road surface; t e

Figure 6 is a detail sectional view on the line 6-6 of Figure 2; 70

Figure 7 is anenlarged detail view of the rear portion of the machineshowing the means provided for adjusting the rear carrying wheels topermit the blades toy be moved into and out of engagement with the roadsurface; and

Figure 8 is a detail sectional view on the line 8--8 of Figure 1 showingthe pivotal connection of the rear blade with the main frame. v

The main supporting frame of the machine comprises a pair of beams 11,preferably of channel iron, having vtheir yforward ends secured'togetherby means of a cross member shown in Figure l.' The rear end portion ofthe side channels 11 .are connected together by means of a cross member14.

A feature of the invention resides in the partieulararrangement of theground working blades'as shown in Figure 1.v The blade 15, shown at theright hand side of Figure 1, has its forward end terminally secured tothe cross member 12 and its rearend secured to the side beam 1.1, fasindicated at 16. A comparatively longer blade 17 has its forward endsimilarly secured to the opposite end of .the crossV member 12 and itsintermediate portion secured to the left hand side channel ,11, asindicated at 18, and its rear end secu-red to the right hand channel l1,as indicated at 19'. The blades 15 and 17 are, therefore, ixedly securedto the main supporting frameV and are movable therewith as a'unit.

A third blade 21 is mounted at the rear end of the main frame and has apivotal connection with the right hand side channel 11, as indicated at22 in Figure 8. The opposite end of the blade 21 is adjustably connectedto a superframe 23, secured to the rear end of the main supporting frameand extending rearwardly therefrom as shown in Figure 7. The meansprovided for adjustably connecting the blade 21 to the frame 23 consistsof a bar or link 24 having a pivotal connection with the blade 21 bymeans of a bracket 25. A series of apertures 26 are provided in theupper end of the link 24 whereby it may be adjustably secured to theframe 23 as by a pin 27. A plurality of apertures 28 are also preferablyprovided in the frame 23 whereby a comparatively fine adjustment may behad of the blade 21 with respect to the main frame and the blades 15 and17 fixedly secured to the frame. By means of this adjustment, the rearend of the blade 21 may be vertically adjusted so as to move the rearportion thereof out of engagement with the road surface, thereby causingthe loose dirt and gravel delivered to the blade 21 by the blade 17, tobe distributed over `the surface of the road with the resultant fillingof all depressions and uneven places therein.

A draft bar or link 29 has its rear end portion secured to the blade 21-by means of a bracket 31, integral with bracket 25, and its forward endadjustably securedto a bracket 32 secured to an upright post 33 of themain frame. (See Figure 7.) A plurality of apertures 34 are provided inthe bracket 32 whereby the forward end of the draft bar 29 may bevertically adj usted to vary the cutting angle of the blade 2l withrespect to the road surface.

The meansprovided for moving the blades into and out of engagement withthe road surfacev is shown in Figures 2, 4, 6 and 7. A cross shaft 35 ispivotally mounted in a bearing provided in the' bracket 32 at one sideofthe main frame, and at the opposite side in a bearing bracket 36, asshown in Figure 6. Crank-arms 37 are keyed to the ends of the crossshaft 35 and have bearing pins or studs 38 secured thereto upon whichthe rear carrying wheels 39 are rotatably mounted. A worm wheel 41 isalso keyed to thecross shaft 35 and meshes with a worm 42 secured to ashort shaft 43 rotatably mounted in'a bracket 44 secured to the u rightpost 33, as shown in Figures 6 and A control rod or shaft 45 isconnected kto the shaft 43 by means of a universal coupling 46, and hasits forward end similarly connected to a shaft 47 telescopicallyconnected with the control shaft 48,` having an operating wheel 49terminally mounted thereon as shown in Figure 2.

When the hand wheel 49 is rotated, rotary movement will be transmittedtothe worm wheel 41, thereby causing the cross shaft 35 to be rotated withthe result that the main frame will be lowered to permit the blades toenga e the road surface, as shown in Figure If desired, the rearcarrying wheels 39 may be moved out of engagement with the groundsurface as indicated by the dotted line in Figure 7, thereby causingsubstantially the entire weight of the machine to be supported upon theblades resting on the road surface.

The forward end of the main frame is vertically adjustable by means lofa worm 51 and gear 52 mounted upon a shaft 53 having crank arms 54secured thereto which are connected by means of links 55 to the forwardend of the main supporting frame, shown in Figure 4. The cross shaft 53is rotatablymounted in suitable bearings secured to an arched nected tothe main frame 1l, as indicated at 57 in Figures l and 4. The forwardendof the arched frame 56 is supported upon the front axle Y58 by means ofa fth wheel 59, as shown lin Figures 1 and 4. The fifth wheel 59 ispreferably of comparatively large diameter in order to provide asubstantial support for the main frame to prevent the outer ends of theblades from lifting when striking bumps or high places in the roadsurface. The two halves of the fth wheel are preferably yieldably heldtogether by means of a compression spring v61 coiled about the upperportion of the king pin 62, as particularly shown in Figure 4. The worm51 and gear 52 are operable by means of a telescopic shaft 63 having ahand wheel 64 terminally mounted thereon whereby it may be convenientlyrotated. The control shafts 48 and 63 are preferably telescopic as abovedescribed, in order that they may be extended forwardly, as'indicated indotted lines in Figure 2, to position them adjacent the operator forconvenient manipulation. The fifth wheel is provided with the usualdraftbar 65 whereby it may be connected to a tractor or other pro--pelling means inthe usual manner.

in Figures 1, ably consists o transversely of the main frame and ivotaand adj ustably connected therewith y means of Vthrust members 67 havingpivotal connections with` the main frame as ln'dicated at 68. -f Theusual scarier' teeth69- are demountably secured to the frame 66, and areadapted to be moved into and out of enga ement with the ground surfaceas shown in igures 4 and 5'.'

Brackets 71 are secured to the scariier `b ar or framey 66 and have linkconnections with crank arms 72 secured to across shaft73. rotatablymounted in suitable bearing brackets 74 secured to the forward. portionof the main frame. A gear segment 75 `is secured to the yshaft 73 and isengaged by a worm 76 l mounted upon a short operating shaft 77 shown inFigure 1.' Rotation of thevhand` having a hand wheel 78 secured theretoas wheel 78 will cause the scariier teeth'to be moved into and out ofenga ement with the ground surface as shown in i ures4 and 5.

In the operation of this nove machine, thel -blades are moved intoengagement with the road surface, the pressure of the blades with theground being controlled entirely 'by means of the hand wheels 49 and64.l If it is desired to use the machine as a drag, the rear wheels maybe moved substantially out' of contact with the ground, thereby causingpractically the entire weight of the machine to be supported upon theblades. In actual practice, however, the rear vwheels areleft in contactwith the ground so that the rear blade 21 may be vertically adjustedwith respect to the road surface to cause the loosened material orgravel delivered thereto to be ing over bumps and high spotsA in theroad surfacewhich might occur if the frame were not supported as abovedescribed. The structure is so constructed and arranged that'tlleadjustment of the main frame to raise and l lowerthe blades into and outof `contact with the road surface, maybe controlled bythe operatorpositioned upon the tractor. at the forward end of the machine;

I claim as my invention: i A

1. A machine of the class described comprisine a frame having rearcarrying wheels, road finishing blades mountedein said frame anddepending therefrom, an auxiliary fra-mev having a pivotal connectionwith the middle portion of said main frame, forward carryon saidauxiliary frame, a crank.thxgereon,aI

worm and worm wheel forfoperating'said- 2 4 and` 5. Such means pref-erfa scariier framel 66-arrangledv Wheels therefor shaft and a linkconnecting saidcran'k .with 7 the ,forw'ard portion of said iframe;whereby when saidv worm is operated,said] auxiliary frame and theforward' ortionofQv said main frame will be raised or oweredf 2. Amachine of the class describedfcornvprising va main frame and rear`carrying;

a plurality of blades supported -by said frame and arranged in angu--.l,

lar. relation to one another, an auxihar frame pivotally connected atone end `to the intermediate portion of said kmain framyf. v mechanismmounted on said-,auxiliary frame and having connections withsaid mainframe for raising or lowering said framev and blades, and operatingmeans for said mecha.v

nism positioned forwardly of said auxiliary i frame, wherebyit may bemanipulated by an operator.

positioned forwardly of the machine. v

combination, a maur frame'-having rear .carrying wheels, a plurality ofblades supported on said frame'` and arranged one before the Aother andin angular relation with respect to one another, mechanism for vertin.cally adjusting said frame upon said wheels to move the blades into andout of engagement with the ground, an auxiliary frame lpivotallyconnected with said mainframe, ex-

tending forwardly thereof and provided at l its forward end withcarrying wheels, a scarifier mounted at the forward end of said mainother, carrying wheels for the rear end of the frame, means forvertically adjusting said main fra-me upon said carrying wheels to movethe blades into and out of engagement with the ground, an auxiliaryframe' connected to the forward end of said main frame, carrying wheelstherefor, means also atvthe forward end of said main frame forvertically adjusting the latter, a scarifler pivotally connected to theforward endof said main frame beneath said auxiliary frame, -and meansfor vertically adjusting said s'carifier independently of said mainframe.

5. A machine of the class described, comprising a-main frame havingscraper blades frame, extending forwardly thereofand pro-v -vided at itsforward portion with suitable ing wheels whereon the'forward end ofsaidauxiliary frame is mounted, a shaft'm'ounted iary frame for verticallyadjusting the ,for-

:mounted thereon and depending therefrom, 1 an auxiliary frame connectedwith said main wardportion ofsaid mainframe, and means I locatedat thevforward portion of the amril r y ss l i 3. A road finishing machinecomprising in iary frame whereby said mechanism may be actuated b anyoperative position forwardly ofthe mao ine.

6. A machine of the class described, comprising a main frame havingscraper blades mounted thereon and depending therefrom, an auxiliaryframe having a pivotal connection with said main frame, extendingforprising a main frame having scraper blades nounted thereon anddepending therefrom, an auxiliary frame connected with said main frame,extending forwardly thereof and pruvided at its forward portionwithsuitable carrying wheels, a shaft mounted on said auxiliary frameand having link connections with said main frame, and means foroperating said shaft to vertically adjust the forward portion of saidmain frame to move the blades into or out of engagement with the ground.

8. A machine of the class described, comprising a main frame havingscraper blades mounted thereon and depending therefrom, an auxiliaryframe having a pivotal connection with said main frame, extendingforwardly thereof and provided at its forward portion with suitablecarrying wheels, a shaft mounted on said auxiliary frame and providedwith crank arms, links connecting said arms with said main frame, and aworm-andgear mechanism for operatingl said shaft to vertically adjust,the forward portion of said main frame to move said blades into or outof engagement with the ground.

9. A machine of the class described, comprising a main frame havingscraperv blades arranged thereon, one before the other, wheelssupporting the rear end of said frame, means for vertically adjustingsaid frame upon said wheels to adjust the position of the rear bladewith respect to the ground, an auxiliary frame connected with theforward portion of the main frame, extending forwardly thereof andprovided at its forward end with suitable carrying wheels, adjustingmeans on said auxiliary frame for vertically adjusting the forwardportion of the main frame independently of the rear portion thereof, andmeans located at the forward portion of said auxiliary frame foractuating said rear and forward adjusting means.V

10. A machine of the class described, comprising a main frame havingscraper blades mounted thereon, supporting wheels connected withthe'rear end of said frame, means for vertically moving said frame withrespect to said wheels to adjust the position of v the blades withrespect to the ground, an auxiliary frame having its rear portionpivotally connected with said main frame and its intermediate portionmovably connected with the forward portion of the main frame,

vertically moving said frame with respect to A said wheels to adjust theposition of the blades with respect to the ground, an auxiliary framehaving its lrear portion pivotally connected with said main frame andhaving its other end positioned forwardly of the main frame andsupported upon suitable carrying wheels, means on said auxiliary framefor vertically adjusting the forward end of said main frameindependently of the rear portion thereof, and a scariiier mounted atthe forward end of said mainframe and adapted for vertical adjustmentindependently of said main frame.

12. A machine of the class described, comprising a main frame havingscraper blades mounted thereon and depending therefrom, an auxiliaryframe connected with said main frame, extending forwardly thereof andprovided at its forward portion with suitable carrying wheels, a shaftmounted on said auxiliary frame and having connections with said mainframe and means for operating said shaft to vertically adjust theforward portion of said main frame to move the blades into or out ofengagement with the ground.

13. A main frame having blades thereon,

an auxiliary frame, means pivotally supporting an end portion of themain frame, means pivotally supporting an end portion of the auxiliaryframe, a pivotal connection between the opposite end portion of saidauxiliary frame and an intermediate portion of the main frame, and anadjustable connection between an intermediate portion of the auxiliaryframe and the 'end portion of the main frame opposite its pivotalsupporting means.

14. A main frame having a forward and a rearward scraper blade thereon,an auxiliary frame, means pivotally supporting an end portion of themain frame, means pivotally supporting an end portion of the auxiliaryframe, apivotal connection between the opposite end portion of saidauxiliary frame and an intermediate portion of the main frame, anadjustable connection between an intermediate portion of the auxiliaryframe and the forward end portion of the main frame whereby the forwardscraper -blade may be adjusted relative to the ground, and means forraising and ylowering the rearward scraper blade.

15. A main frame having scraper blades mounted forwardly and rearwardlythereof, an auxiliary frame, carrying wheels supporting the rear endportion of the main frame, means pivotally supporting the forward endportion of the auxiliary frame, a pivotal connection between the rearend portion of said auxiliary frame and an intermediate portion of themain frame, and an adjustable connection between an intermediate portionof the auxiliary frame and the forward end portion of the main framewhereby the forward scraper blade may be adjusted relative to theground. l

16. A main frame having scraper blades mounted forwardly and rearwardlythereof, an auxiliary frame, carrying wheels supporting the rear endportion of the main frame, wheels supporting the forward end portion ofthe auxiliary frame, a pivotal connection between the rear end portionof said auxiliary frame and an intermediate portion of the main frame,an adjustable connection between an intermediate portion of theauxiliary frame and the forward end portion of the main frame wherebythe forward scraper blade may be adjusted relative to the ground, andmeans for raising and lowering the rear portion of said main frame withrespect to its, carrying wheels, to adjust the rearward -scraper bladerelative to the ground.

17. A main frame having a plurality of scraper blades supported thereon,an auxiliary frame, wheels supporting the rear end portion of the mainframe, means sup orting the forward end portion of the auxi iary frame,a pivotal connection between the rear end portion of said auxiliaryframe and an intermediate portion of the main frame, an adjustableconnection between an intermediate portion 0f the auxiliary frame andthe forward end portion of the main frame, whereby the forward endportion of said main frame may be adjusted relative to the ground, and ascarifier adjustably supported on the forward end portion of the mainframe.

18. A main frame having a. plurality of scraper blades supportedthereon, an auxiliary frame, wheels supporting the rear end portion ofthe main frame, means supporting the forward end portion ofthe auxiliaryframe, a pivotal connection between the rear end portion of saidauxiliary frame and an intermediate portion of the main frame, an

adjustable connection between an intermediate portion of the auxiliaryframe and the forward end portion of the main frame, whereby the forwardend portion of said main frame may be adjusted relative to the ground, ascarifier supported on the forward end p0rtion of the main frame, andmeans on the intermediate portion of the auxiliary frame for adjustingthe A scarifier relative to the ground.

In witness whereof, I have hereunto set my hand this 24th day of August,1926.

CARL A. GUSTAFSON.

